I bought this from the previous drop and they are my go to portables now. If you're like me, someone who used IEMs for portable use, try this and you might never go back. The details and sound can match my bigger Beyerdynamic DT880 at a much smaller size. Instead of forking out a few hundred dollars for a 4 - 6 way driver IEM, this might just be your solution for portable use and perhaps even better.